Carton lining machine



Sept. 27, 1931s.- A. w. LINDHOLM 2,131,633

CARTON 'LINING MACHINE Filed May 20, 1937 '4 sheet -sheet 1 INVEN QLMQQM 1 ATTORNEY TOR Sept. 27, 1938. A. w. LINDHOLM 2,131,633

' CARTON LINING MACHINE Filed May 20 1937 I 4 'SheetS-Sheef 2 jag 96- INVENTOR ATTORNEY ww gm Se pt. 27, 1938. A. w. LINDHOLM 2,131,633

CARTON LINING MACHINE Filed May 20, 1957 4 sneets snet s INVENTOR BY Mr QMQM LL Q ATTORNEY Sept. 27,1938.

A w. LINDHOLM QARTON LINING MACHINE Filed May 20, 1937 A 4 Sheets-Sheet 4 lNVENTbR v amp w.

cmculu.

v ATTORNEY Patented Sept. 21, 1938 UNITED STATESPATENT OFFICE CARTON 1.1mm; MACHINE Arthur w. Lindholm, East Milton, Mass., assignor to Pneumatic Scale Corporation, Limited, Quincy, Massz, a. corporation of Massachusetts Application May 20, 1937, Serial No. 143,74'1

13 Claims.

This invention relates to a carton lining machine and particularly to mechanism for producing the bottom fold of a lining for a carton.

' The object of the invention is to provide a car- 5 ton lining machine of novel and improved construction in which provision is made for producing a novel and improved bottom fold for the lin-' er which is neater in appearance and more efllcient in its moisture resisting qualities.

L With this object in view and such others as may hereinafter appear, the invention consists in the carton lining machine, in the mechanism for producing the bottom fold and in the various structures, arrangements and combinations of parts hereinafter described and particularly defined in the claims at the end of this specification.

In the drawings illustrating the preferred embodiment of the invention, Fig; 1 is a developed view of a blank from which the lining of the present invention is made; Figs. 2, 3 and 4 illustrate in; perspective the various steps in the production or the bottom fold; Fig. 5 is a side elevation, partly in cross-section of the mechanism for producing the bottom fold; Fig. 6 is a front elevation of the mechanism shown in Fig. 5 with the operating parts added; Fig. '7 is a plan view of the mechanism shown in Fig. 6; and Figs. 8, 9 and 10 are detail views of the tab holding fingers, to be referred to.

In general, the present invention contemplates the provision of a novel machine for forming a lining and for inserting the lining into a carton in a novel and superior manner and in which provision is made for producing a novel and superior 5 bottom fold on the lining. Heretofore, in previous carton lining machines, of which the applicant is aware, the usual method of forming the bottom fold of a lining has been to fold the extended side portions of the lining blank against the ends of'a 40 forming block, leaving triangular shaped tabs or flaps extending outwardly from the bottom and thereafter folding these triangular shaped flaps upwardly against the sides of the forming block.

This method of producing carton linings has proved unsatisfactory in many respects, chiefly because the triangular fold presented an unnec essary thickness of lining material to be folded up 'wardly against the sides of the forming block.

t In .the-case of a parafiin paper lining which is heat sealed along the overlapping edges, this bulky thickness formed by the triangular fold is difllcult to se'al due to the fact that the heat. appliedto the forming block does not penetrate through ,the several thicknesses of the overlapping por- 55. tions of the bottom fold with sufficient intensity to melt the paramn, resulting in an imperfectly sealed lining and failing to produce a moisture resisting seal for the bottom of the lining. Also, in the case of an adhesively sealed lining, thebulk of the triangular folds madeit dimcult to produce a, 5 satisfactoryseaL- I In accordance with the present'inve'ntion it is contemplated to provide mechanism for producing a lining in which the bottomflaps areconstructed so that a major portion of the bottom 1. flaps will comprise but one thickness of lining material which may be easil heat sealed or adhesively sealed against the ides of the lining to produce a carton liningwhich is neat in appear ance and has a maximum moisture resistance.

Referring now to the drawings, the-present infor lining cartons, and except as to su hdetails v as are hereinafter pointed out, the illust ated machine comprises any of the usual forms of carton 2O lining machines now upon the market. Reference is made to the patent to Hiller and Joplin, No. 1,037,005, dated August-2'7, 1912,-as disclosing the details of construction and mode of operation of such prior art carton lining, machines. Inasmuch 25 as many portions of the carton lining machine of themselves constitute no part of the present invention, it has been deemed suflicient to illustrate only. suflicient portions of the carton lining 2 machine as will enable the present invention to 30 be understood. As is generally known, and as illustrated in the Killer and Joplin patent. above referred to, these prior art carton liningma chines are provided with means for ieeding the lining from a continuous web and in the operation 35 of the machine, the lining is cut oil. to the proper length and positioned beneath a plunger or forming block 8. The'lining blank I0 is supported on supporting plates l2, l4 which'are spaced apart' vention' is illustrated as embodied in a machine j.

sufficiently to permit thefrming block to de 4o hold it against the sides of the block. During its 4,5

descent, the block with its lining a blank thus turned up against its two opposite sides passes between two guide plates 20, 22 which keep the blank folded against the sidesof the block while the extended sides of the blank are folded in againstthe 50 ends of the block'as will be described.

In order to produce the bottom fold as shownin Figs. 2, 3 and4 it is necessary to form slits 25 in the lining blank III which result in the tab-portions 26 of the'bottom flaps when the folding op-' erations are performed. These slits 26 may be formed in thelining blank many well-known manner such asbyknives or cutter bars .inserted in the feeding rolls, not shown.

' After til Fig. 6, it is caused to remain in this position until the lateral projecting portions orside fiaps of the lining are folded over the ends of the block. The folding of the side flaps is accomplished in the manner illustrated in the Killer and Joplin patent, above referred to, and as herein shown two sets of folder plates 26, 66, one set for each end of the forming block are'employed, The folder plates are arranged to be swung toward each other and downwardly in vertical planes to engage the projecting side fiaps and to fold them against the ends of the forming block.

While the side folding operations are being per.- formed, the tab portions 26 are arranged to be held in an extended position, as illustrated in 'liig. 3, so that when the side portions", '64 of the lining are being folded inwardly, the tab portions will not be folded in with them. This is accomplished bytab holding fingers 66 which are arranged to be operated by connections from'and 1 in timed relation to the folding plates 26,66. It

- will be noted that when the forming block comes to rest in its intermediate position, preparatory to the folding operation, the extended ends'of the'lining including the tab portions 26 on the bottom of the block are resting on stationary plates 36. [When the holding fingers 66 are released to grip the tab portions, the fingers will hold them in an extended position against the plates.

f'driven in any usual or preferred manner fromthe driving mechanism, not 'shown,-of the carton I 7 gen; are released to grip'the Referring now particularly to Figs. 6 and 7 each folder plate 26 is carried by a link 46 pivotally connected to'arms 42, 44. The arm 44 is fast on the rocker shaft 46 which is arranged to be rocked by a cam 46, secured to the cam shaft 66; The 62 carried by cam 46 cooperates with a;cam roll a forked link 64 which embraces The link 64 is connected to a lever the shaft 66. 66, fast upon "the rocker shaft 46, by a connecting rod 56. A spring 56 is providedfor the well-known purpose of holding the follower against the cam.

The opposite set of. folder plates ,66, similarly carried by a link 66, pivotally connected to arms 62, 64 are arranged to be rocked by a cam 66 secured to the cam shaft 66. A cam roll 66 carried by a lever I6, fast upon the rocker shaft 12,

- cooperates with the cam 66 to rock the shaft I2 upon which the arm 62 is also secured. A spring I4 is likewise provided to hold the cam roll 66 against itscam 66. The cam shaft 66 may be lining machine.

In the operation of the folder plates, the set of 5 folder plates 26 are arrangedto be rocked first to fold the extended side fiaps 62 against the end of the forming block 6, and while these'plates 26 are being retracted, the second set of folder plates '66 areadvanced to'fold the remaining side flaps 64in overlapping relationship to the flaps 62.

The tab holding fingers. 66, which are actuated 'y'the rocking of thefolder plates are arranged in such a manner that when thefirst set of folders f26 .f start their inward movement, the holding finextended tabs 26 -b efore the plates come in contact with the linen. 1 'I'-hrough=connections from the second set of fold- I 66, the holding fingers are arranged to be reset at the end'of the folding stroke, so that'when e forming block has descended to an in- .termediate position,' as illustrated in full linesin the condition shown in Fig.

claimed is:

both sets of plates are withdrawn, the holding fingers will be back in their normal position. As

best shown in Figs. 8, 9, 10, each holding finger 66 is pivoted upon a stud 66 and is normally held in its upraised or, retracted position by a latch 62 which engages with a latch member 84 secured to the holding finger. The latch 62 is rockingly' mounted on a stud 66 and is normally held in.

latching engagement by a spring. 66. The springis secured to an arm 66 extending from the latch hub, the arm also serving as a stop arm to limit the movement of the latch. The latch retains the holding finger in its upraised position against the action of a coil spring 62 which is wound around the extended end of the holding finger stud 66. One end of the coil spring is retained by the base 64 of the supporting bracket 66 and the other end bears against the finger 36 so that when the latch 62 is'rocked counterclockwise viewing Fig. 8, the tension in the spring will cause the finger to-be rocked downwardly tohold the tab portions 26 1 against the plate 66.

In order to rock the latch 62, a bar 66 pivotally connected to a stud I66 secured to an intermediate portion of the arm 42, is provided. The outer end of the bar 66, which is supported in a grooved out portion I62 01' the bracket 66, is provided with a cut out portion I64 which is arranged to engage with a fiat surface I66 cut in the latch 62 when the folders" are rocked inwardly. The out out portion I64 on the bar 66 is positioned so that very little movement of the folder will cause-the holding fingers to be released to grip the tabs 26 before the actual folding operation is performed. Further movement of the folders 26 will fold the flaps 62 against the end of the block. whereupon caused to slide forward with the folder plates," 7 during thefolding operation As illustrated in Figs. 8, 9.10, the holding finger is provided with a cam roll II4 which isarranged to-engage with the cam surface I I6 on the sliding cam piece I66.-

It will be apparent that when-the raised portion II6 of the cam piece engages the roll H4 at the end of the folder stroke, the holding fingers will be reset by the engagement of the latch member 64 with the latch 62. Both sets of folders are now withdrawn and the lining will befolded in After the side flaps have thus been folded, the forming block 6 is caused to'descend, and, as it descends the outwardly extending bottom, fiaps are folded upwardly upon the ends of the'forming block by verticalv folding plates I26, I22 which are yieldingly supported on brackets I24, I26,

- mounted upon the frame members I26, I66. The

further descent of the forming block carries the block with its lining into the carton previously 47 positioned beneath it whereupon the forming block is withdrawn, leaving carton. v

While the preferred embodiment of the invention has been herein illustratedand described, it will be understood that the invention may be en bodied in other forms within the scope of the following claims.

Having thus described the invention, what is the lining within the 1. In a carton lining machine, in combination,

a lining block, means for folding two sides of a lining blank against the block with end and bottom flap forming portions of the lining extending beyond the ends of the block, said bottom flap forming portions each being provided with a pair, of slits forming a tab therebetween,

a pair of successively operating folding members for each end of the block for folding the end flaps,

means engaging said tabs for holding out each bottom tab until the end flaps are folded, and

means for thereafter folding the bottom tabs upon the previously folded end flaps.

2. In a carton lining machine, in combination,

a forming block, means for wrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the ends of the block, said bottom flap forming portions each.

s being provided with a pair of slits forming a tab thereb'etween, and means for successively fold ing the'end flaps and said tabs and means en gaging said tabs while said end flaps are being folded. i

3. In a carton lining machine, in combination, a forming block, means for wrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the ends of the' 40 blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the ends of the block, said bottom flap forming portions each being provided with a pair of slits forming a tab therebetween, means for successively folding the end flaps of the lining, means engaging said tabs for holding each bottom tab until the end flaps are folded, and means for thereafter folding the bottom tabs upon the previously folded 5. In a carton lining machine, in combination,

a forming block, means for wrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the ends of the block, said bottom flap forming portionsbeing slit to form tabs, means for successively folding-the end flaps of the lining, means for holding each bottom tab until the end flaps are folded,

5 and means thereafter folding the bottom tabs upon the previously folded end flaps, each of said holding means including a spring actuated member and a. tab supporting. member cooperating therewith.

a forming block, means for wrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the ends of the block, said bottom flap forming portions being slit to form tabs, means for successively folding the end flaps of the lining, means for holding each bottom tab until the end flaps are folded,

I and meansjfor thereafter folding the bottom tabs upon the previously folded end flaps, each of said 6. In a carton lining machine, in combination, F

tab holding means including a movable tab en- ]gaging member, a supporting member cooperating therewith and connections between the movable tab engaging member and the end flap folding means for controlling the operation of the tab holding member. a

7. In a carton lining machine, in combination, a forming block, means for wrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming portions of the lining extending beyond the endsof the block, said bottom flap forming portions being slit to form tabs, means for successively folding the 1 end flaps of the lining,-means for holding each bottom tab until the end flaps are folded, and means for thereafter folding the bottom tabs upon the previously folded end flaps, each of said tab holding means including a spring actuated member, a latch for holding the spring actuated member in inoperative position and means for releasing the latch to permit said memberv to of the end flap folding operation. I

8. In a carton lining machine, in combination,

a forming block, means for, wrapping a lining V ated member, a latch for holding the same in inoperative position, and means operatively con-'- nected to the end flap folding means for re-- leasing the latch at the start. of the end flap folding operation. I l

9. In a carton'lining machine, in combination, a forming block, means for'wrapping a lining blank about the bottom and twosides of the block with end and bottom flap forming portions of the lining extending beyond the ends ofthe block; said bottom flap forming portions being slit to form tabs, means for successively folding the 'end flaps of the lining, means for holding each bottom tab until the end flaps are folded, andmeans for thereafter folding' the bottom tabs upon the previously folded end flaps, each of said tab/holding means including a spring actuated member, a latch for holding the same in inoperative position, means for releasing the latch at the start of the end flap folding operation, and means for resetting saidmembers at the end of the folding operation.

10. In a carton lining machine, in combinabe moved into tab engaging position at the start tion, a forrning block, means forwrapping a lining blank about the bottom and two sides of the block with end and bottom flap forming poi- 'tions of the lining, extending beyond the ends of I each of said tab holding means including a-spring actuated member, a latch for holding the same in inoperative position, means operatively connected with the fla'p folding means for releasing the latch at'the start of the end flap folding operation, and means operativeiy connected with at the end of the folding operation.

11. In a lining machine, lining forming mechanism includingend flap folding mechanism in-- cluding spring actuated members, bottom. tab

, bottom flap forming portions/of thelining extending beyond the ends of (the block, said bottom flap forming portions each being provided ,with a pair of slits forming a tab therebetween a pair of successively operating folding members for each end vof the block for folding the end flaps,

a,1s1', c'sssaid folding means for resetting saidmembers k with end and.

means engaging said tabs for holding out. each bottom-tab until the end flaps are folded, and" means thereafter folding the bottom tabs upon the previously folded end flaps, the major porcomprisingbuta single 5 tion of said bottom tabs thickness of the lining.

13, In a lining machine, lining forming mechanism including end flap folding mechanism lneluding spring actuated members, bottom tab holding mechanism and means for operating the 10:

bottom tab holding mechanism to permit the end flaps to be folded before the bottom tab is folded, and means for folding the bottom tabs upon the previously folded end flaps, said bottom tabs being slit so that the major portion of 15 the latter folded upon the end flaps comprises but a single thickness of paper; I

anmua w; LINDHOLM. 

